JP2015151096A - Curtain airbag device and bracket device for curtain airbag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curtain airbag device which is formed into a simple and inexpensive structure and helpful to easy assembly of a cushion to a vehicle body, and to provide a bracket device for the curtain airbag device.SOLUTION: A curtain airbag device 100 includes: a cushion 102 which is stored in a slender form; a cylindrical inflator 108; a bracket 118 which fixes the cushion 102 and the inflator 108 to a vehicle body side wall; and a fixing member 124b which is wound around the bracket 118 while being wound around the cushion 102 and the inflator 108. The bracket 118 includes: an inflator installation part 120; a holding plate 130 which brings up the cushion 102 from below and holds the cushion 102 pressing the cushion 102 against the inflator 108; and fixing parts 126a, 126b which are fixed to the vehicle side wall below both sides of the holding plate 130 when viewed in a vehicle fore and aft direction. The fixing member 124b is wound around the bracket 118 at a position of the holding plate 130.

Description

  The present invention relates to a curtain airbag device including a cushion that inflates and deploys along a side surface of a vehicle interior for the purpose of protecting an occupant at the time of a side collision or rollover (rollover) of a vehicle, and a bracket device for a curtain airbag It is about.

  Modern vehicles are almost equipped with airbags as standard. An airbag is a safety device that operates in an emergency such as a vehicle collision, and inflates and deploys with gas pressure to receive and protect an occupant. There are various types of airbags depending on the installation location and application. For example, a front airbag is provided in the center of the steering wheel in order to protect the driver from collisions in the front-rear direction. In addition, a curtain airbag that inflates and deploys along the side window is provided in the vicinity of the ceiling of the wall portion in order to protect the occupant from a side collision and subsequent rollover (rollover).

  The cushion of the curtain airbag has a large shape covering a side window and the like, and is mounted on the upper part of the vehicle body side wall in a slender storage form wound or folded from below. Such a curtain airbag is often provided with a dedicated bracket for fixing not only a cushion in a storage form but also an inflator, which is a heavy object, to the side wall of the vehicle body. For example, Patent Document 1 describes a bracket made of metal and resin. In patent document 1, it is the structure which lifts the cushion of a storage form from the bottom in the part called a regulation wall so that the operation | work at the time of fastening to the vehicle body side wall of a bracket is easy.

JP 2013-169933 A

  However, the bracket of Patent Document 1 is composed of two parts, that is, a first bracket member that is made of metal and covers the vehicle body side of the inflator and the cushion, and a resin-made second bracket member that has the above-described restriction wall. . Such a configuration is not a good measure for reducing material costs and simplifying assembly work. In addition, although the regulation wall that lifts the cushion is said to bend when the cushion is inflated and deployed, it may affect the deployment behavior of the cushion because it is installed with a certain range in the vehicle longitudinal direction. In order to suppress the influence on the deployment behavior of the cushion, it is conceivable to perform molding after predicting the deployment behavior, but if the molding accuracy needs to be improved, the cost increases.

  In view of such problems, the present invention provides a curtain airbag device and a curtain airbag bracket device that have a simple and inexpensive configuration and can contribute to facilitating assembly work of a cushion to a vehicle body. The purpose is to do.

  In order to solve the above problems, a typical configuration of a curtain airbag device according to the present invention is configured in a bag shape, and is mounted on a vehicle body in a slender storage form in the vehicle front-rear direction by being wound or folded. A cushion that is arranged along the upper edge of the cushion and supplies gas for inflation and deployment to the cushion, a bracket that fixes the cushion and the inflator to the upper part of the vehicle body side wall, and a cushion on the bracket And a fixing member that is wound together with the inflator, and the bracket is disposed between the inflator and the side wall of the vehicle body so as to be attached to the inflator, and protrudes inward in the vehicle width direction below the inflator attachment portion. Lift the cushion from below and lift the cushion against the inflator A holding plate that holds the cushion by the attachment, and two fixing portions that are provided on both sides of the holding plate in the vehicle front-rear direction and are fixed to the vehicle body side wall below the surface with which the cushion of the holding plate contacts. The fixing member is wound around the bracket at the position of the holding plate.

  In the case of the curtain airbag device, the bracket holding plate lifts the cushion when assembled to the side wall of the vehicle body, so that the cushion hangs down and hides the fixed portion located below the holding plate. The fixed part is exposed. Therefore, it is very easy to perform work using a tool or the like on the fixed part. In addition, since the cushion is pressed against the inflator and compressed by the holding plate, the curtain airbag device is compact in the vertical direction and can be installed effectively even in a narrow space above the side wall of the vehicle body. It is. Furthermore, the bracket has a simple structure that can be realized as an integral part, and can contribute to cost reduction.

  The bracket is made of metal, and the holding plate may be formed by bending a region between the two fixing portions. If it is this structure, the bracket of the simple structure which can be manufactured from one sheet-metal member is realizable.

  In order to solve the above-described problems, a bracket device for a curtain airbag according to the present invention includes an inflator mounting portion that is disposed between a cylindrical inflator and a side wall of a vehicle body so that the inflator is mounted with its longitudinal direction directed in the vehicle longitudinal direction. And a holding plate for holding the cushion by lifting the cushion from the bottom by projecting inward in the vehicle width direction below the inflator mounting portion and pressing the cushion against the inflator, and both sides of the holding plate in the vehicle longitudinal direction And two fixing portions that are fixed to the side wall of the vehicle body below the surface with which the cushion of the holding plate contacts.

  Even in the above-described curtain airbag bracket device, since the holding plate lifts the cushion when assembled to the side wall of the vehicle body, it is very easy to perform a work using a tool or the like to the bracket fixing portion. Further, since the cushion can be compressed by pressing the cushion against the inflator with the holding plate, it can be effectively installed even in a narrow space above the side wall of the vehicle body.

  The curtain airbag bracket device may be made of metal, and the holding plate may be formed by bending a region between the two fixing portions. If it is this structure, the bracket of the simple structure which can be manufactured from one sheet-metal member is realizable.

  According to the present invention, a curtain airbag device and a curtain airbag bracket device that have a simple and inexpensive configuration and can contribute to facilitating the assembly work of a cushion to a vehicle body.

It is the figure which illustrated the curtain airbag apparatus concerning embodiment of this invention. It is an enlarged view of the inflator periphery of Fig.1 (a). FIG. 3 is an exploded view of the curtain airbag of FIG. It is the figure which illustrated the bracket of FIG. 3 independently from each direction. It is BB sectional drawing of the curtain airbag apparatus of Fig.1 (a).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(Curtain airbag device)
FIG. 1 is a diagram illustrating a curtain airbag device (hereinafter referred to as “curtain airbag 100”) according to an embodiment of the present invention. FIG. 1A is a view of the curtain airbag 100 before operation as seen from the vehicle inner side in the vehicle width direction, and illustrates the storage form of the cushion 102. The cushion 102 is a portion that is inflated and deployed in an emergency to protect the occupant, and FIG. 1B illustrates the cushion 102 at the time of inflation and deployment. In the following, in the present application, the expression “upper” indicates the vehicle ceiling direction as viewed from the attention location, and the expression “lower” indicates the vehicle floor direction as viewed from the attention location.

  As illustrated in FIG. 1A, the cushion 102 is wound to form a roll-shaped storage form that is elongated in the front and rear of the vehicle, and is attached to the roof side rail 104 at the top of the vehicle body side wall and mounted on the vehicle 106. The Usually, the roof side rail 104 is covered with a roof trim (not shown). That is, the cushion 102 is housed in a space between the roof side rail 104 and the roof trim, and is not visible from the passenger compartment where the passenger is present. Therefore, it should be noted that the cushion 102, which is originally invisible from the vehicle interior, is visualized by omitting the roof trim even if it is described in the text as “viewing the cushion 102 from the vehicle interior”. The storage form of the cushion 102 can be realized not only by winding but also by folding.

  The curtain airbag 100 includes an inflator 108, which is a gas generator, at the center of the upper portion of the cushion 102. The cushion 102 is inflated by the pressure of gas supplied from the inflator 108 to restrain the occupant. The inflator 108 employed in this embodiment is of a cylinder type (cylindrical type). Inflators that are currently popular are types that are filled with a gas generating agent and burn it to generate gas, types that are filled with compressed gas and supply gas without generating heat, and There are types including both a gas generating agent and a compressed gas. Any type of inflator 108 can be used.

  In the state of FIG. 1 (a), when a side collision or rollover (rollover) occurs in the vehicle 106, a sensor (not shown) provided in the vehicle 106 first detects an impact, which causes the inflator. A signal is transmitted to 108. In response to this signal, the inflator 108 is activated and gas is supplied to the cushion 102. When the gas from the inflator 108 is received, the cushion 102 is inflated and deployed downward along the side window 110 and the like as illustrated in FIG.

  The cushion 102 is for a curtain airbag and has a large shape that can be spread over the side window. The cushion 102 is formed into a bag shape by sewing and bonding two base fabrics constituting the surface thereof, sewing or bonding using OPW (One-Piece Woven).

  In the present embodiment, the inflator 108 is installed near the upper portion of the center pillar 107. A bracket 118 (see FIG. 2B) is attached to the periphery of the inflator 108 in the curtain airbag 100 to fix the inflator 108 and the cushion 102, and the like. Hereinafter, the configuration of the curtain airbag 100 will be further described with the bracket 118 as the center.

  FIG. 2 is an enlarged view around the inflator 108 of FIG. FIG. 2A is a view of the periphery of the inflator 108 as viewed from the vehicle inner side in the vehicle width direction. The inflator 108 is inserted into the gas inlet 112 provided at the upper part of the cushion 102 from the gas ejection hole 114 side at the tip. And the longitudinal direction is arrange | positioned along the upper edge of the cushion 102 of a storage form toward the vehicle front-back direction. A connector 116 is provided at the rear end of the inflator 108. The connector 116 is electrically connected to the vehicle side to receive an operation signal or the like.

  FIG. 2B is a perspective view illustrating the curtain airbag 100 of FIG. As illustrated in FIG. 2B, a curtain airbag bracket device (hereinafter simply referred to as “bracket 118”) according to an embodiment of the present invention is attached to the side walls of the inflator 108 and the cushion 102. ing. The bracket 118 grips the inflator 108 and the cushion 102 and fixes them to the roof side rail 104 (see FIG. 1A). The bracket 118 has a solid metal structure in order to support the inflator 108 having a corresponding weight and to withstand a load during operation of the inflator 108.

  FIG. 3 is an exploded view of the curtain airbag 100 of FIG. The bracket 118 has an inflator attachment portion 120 to which the inflator 108 is attached at the top. The inflator mounting portion 120 is disposed between the inflator 108 and the vehicle body side wall, and the inflator is mounted with its longitudinal direction facing the front and rear of the vehicle. The inflator mounting portion 120 is curved along the side surface of the cylindrical inflator 108 and grips the vehicle body side wall side and the upper side of the inflator 108.

  Two bands 122a and 122b are used to attach the inflator 108 to the inflator attachment portion 120. The bands 122a and 122b are wound together with the inflator 108 from above the inflator attachment portion 120 on both front and rear sides of the inflator attachment portion 120 in the vehicle. The bands 122a and 122b are made of metal or resin, have high material strength, and do not fall off even when the cushion 102 is inflated and deployed.

  The cushion 102 has a wound storage configuration and is connected to the bracket 118 along the lower side of the inflator 108. For fixing the cushion 102 to the bracket 118, three fixing members 124a to 124c are used. The fixing members 124a to 124c are wider than the bands 122a and 122b and are made of a material having a certain degree of flexibility such as fibers and resins. The fixing members 124a to 124c can be wound around the cushion 102 and the bracket 118 with an adhesive force provided on the back side thereof. In addition, the fixing members 124 a to 124 c can be wound around the bracket 118 or the like by a configuration in which the end portions are connected to each other or the end portions are hooked on predetermined portions of the bracket 118.

  As illustrated in FIG. 2A, the fixing members 124a to 124c are wound around the bracket 118 together with the cushion 102 and the inflator 108, and are held together. The fixing members 124 a to 124 c may be ruptured when the cushion 102 is inflated and deployed. In this case, the fixing members 124a to 124c can be provided with a rupture portion that is weaker than the peripheral region at a predetermined location in order to induce rupture.

  The bracket 118 is provided with two fixing portions 126a and 126b that are fixed to the roof side rail 104 (see FIG. 1A) on both sides in the vehicle longitudinal direction at the lower portion. The fixing portions 126a and 126b have a bolt hole 128 in the present embodiment, and are fastened and fixed to the roof side rail 104 (see FIG. 1A) using a predetermined bolt.

  The bracket 118 of this embodiment further has a holding plate 130 that supports the cushion 102 from below. The holding plate 130 presses the cushion 102 against the inflator 108 and compresses it up and down by lifting the cushion 102 from below. Further, the holding plate 130 lifts the cushion 102 to expose the fixing portions 126a and 126b from the cushion 102, thereby facilitating the fastening operation of the bolts to the fixing portions 126a and 126b.

(Bracket device for curtain airbag)
FIG. 4 is a diagram illustrating the bracket 118 of FIG. 3 independently from each direction. FIG. 4A is a diagram illustrating the bracket 118 from the inside in the vehicle width direction. As illustrated in FIG. 4A, the bracket 118 is slightly longer in the vehicle front-rear direction (left-right direction in the figure) than in the up-down direction. The bracket 118 is made of metal, has the above-described inflator mounting portion 120 on the upper side of the base portion 132 that is a base portion, and has a holding plate 130 at the vehicle front-rear center below the base portion 132. Fixing portions 126 a and 126 b having bolt holes 128 are formed below the base portion 132 and below the holding plate 130 on both sides of the holding plate 130 in the vehicle longitudinal direction.

  FIG. 4B is a view of the bracket 118 of FIG. 4A as viewed from the rear of the vehicle (right side in the figure). As illustrated in FIG. 4B, the inflator attachment portion 120 is formed in a curved shape that can be contacted along the side surface of the inflator 108 (see FIG. 3). The holding plate 130 is provided below the inflator mounting portion 120 so as to protrude from the base portion 132 toward the inside in the vehicle width direction (left side in the figure).

  As illustrated in the perspective view of FIG. 3, the holding plate 130 includes a pedestal portion 134 that lifts the cushion 102 from below, and a neck portion 136 that connects the pedestal portion 134 and the base portion 132. The pedestal portion 134 has a three-dimensional shape whose edge is bent downward. The neck portion 136 is narrower than the pedestal portion 134 and extends inward in the vehicle width direction from the base portion 132.

  FIG.4 (c) is AA sectional drawing of Fig.4 (a). The bracket 118 illustrated in FIG. 4C is molded as an integral part from, for example, a sheet metal plate material. The holding plate 130 is formed by bending a region between the two fixing portions 126a and 126b (see FIG. 4A). The inflator attachment portion 120 is formed by bending along the shape of the inflator 108 (see FIG. 3). Thus, the bracket 118 can be realized at a low cost with a simple structure.

  FIG. 5 is a cross-sectional view of the curtain airbag device 100 shown in FIG. As illustrated in FIG. 5, the holding plate 130 lifts the cushion 102 in the storage form and presses the cushion 102 against the inflator 108 to compress and hold it. Then, at the position of the holding plate 130, the fixing member 124b illustrated in FIG. Thereby, the size of the vicinity of the inflator 108 of the curtain airbag 100 tends to increase if it is originally, but in this embodiment, the vertical size of the vicinity of the inflator 108 is kept compact. Therefore, it can be effectively assembled even in a limited installation space between the roof side rail 104 and the roof trim 138.

  Further, as illustrated in FIG. 2A, since the holding plate 130 lifts the cushion 102, the cushion 102 hangs down and is hidden by the fixing portions 126 a and 126 b positioned below the holding plate 130. There is no. Therefore, the fixing portions 126 a and 126 b are always exposed without being hidden by the cushion 102. Specifically, in FIG. 4A, the bolt holes 128 of the fixing portions 126 a and 126 b are provided below the upper surface of the pedestal portion 134 that is the surface with which the cushion 102 contacts the holding plate 130. Therefore, when the fixing portions 126a and 126b are assembled to the roof side rail 104 (see FIG. 5), it is possible to efficiently perform a work using a tool or the like on the fixing portions 126a and 126b.

  When the inflator 108 is operated in the state shown in FIG. 5, the cushion 102 expands to break the fixing member 124b, and pushes the roof trim 138 to expand downward. At this time, since the holding plate 130 of the present embodiment is a small portion of the bracket 118, the deployment behavior of the cushion 102 is not affected. Further, the holding plate 130 can be bent following the expansion and deployment of the cushion 102 at the neck portion 136, and this can also suppress the influence on the deployment behavior of the cushion 102.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented by various methods. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  Moreover, in the said embodiment, although demonstrated supposing the case where the curtain airbag 100 concerning this invention was applied to a motor vehicle, it is also possible to apply to an aircraft, a ship, etc. besides a motor vehicle, and the same effect Can be obtained.

  The present invention relates to a curtain airbag device including a cushion that inflates and deploys along a side surface of a vehicle interior for the purpose of protecting an occupant at the time of a side collision or rollover (rollover) of a vehicle, and a bracket device for a curtain airbag Can be used.

DESCRIPTION OF SYMBOLS 100 ... Curtain airbag, 102 ... Cushion, 104 ... Roof side rail, 106 ... Vehicle, 107 ... Center pillar, 108 ... Inflator, 110 ... Side window, 112 ... Gas inlet of cushion, 114 ... Gas injection hole of inflator, DESCRIPTION OF SYMBOLS 116 ... Connector of inflator, 118 ... Bracket, 120 ... Inflator attaching part, 122a, 122b ... Band, 124a-124c ... Fixing member, 126a, 126b ... Fixing part, 128 ... Bolt hole, 130 ... Holding plate, 132 ... Bracket , Base part of holding plate, 136, neck part of holding plate, 138, roof trim

Claims (4)

A cushion that is configured in a bag shape and is mounted on the vehicle body in a slender storage form in the vehicle front-rear direction by being wound or folded,
An inflator that is cylindrical and is disposed along the upper edge of the cushion, and supplies the cushioning gas to the cushion;
A bracket for fixing the cushion and the inflator to an upper portion of a side wall of the vehicle body;
A fixing member wound around the bracket together with the cushion and the inflator;
With
The bracket is
An inflator mounting portion disposed between the inflator and the vehicle body side wall to which the inflator is mounted;
A holding plate that holds the cushion by lifting the cushion from below by projecting inward in the vehicle width direction below the inflator mounting portion, and pressing the cushion against the inflator;
Two fixing portions that are provided on both sides of the holding plate in the vehicle front-rear direction and are fixed to the vehicle body side wall below the surface with which the cushion contacts the holding plate;
Have
The curtain airbag device according to claim 1, wherein the fixing member is wound around the bracket at a position of the holding plate. The bracket is made of metal,
The curtain airbag device according to claim 1, wherein the holding plate is formed by bending a region between the two fixing portions. An inflator mounting portion disposed between the cylindrical inflator and the vehicle body side wall, the inflator being mounted with the longitudinal direction thereof directed in the vehicle front-rear direction;
A holding plate that holds the cushion by lifting the cushion from below by projecting inward in the vehicle width direction below the inflator mounting portion, and pressing the cushion against the inflator;
Two fixing portions that are provided on both sides of the holding plate in the vehicle front-rear direction and are fixed to the vehicle body side wall below the surface with which the cushion contacts the holding plate;
A bracket device for a curtain airbag, comprising: The curtain airbag bracket device is made of metal,
4. The curtain airbag bracket device according to claim 3, wherein the holding plate is formed by bending a region between the two fixing portions. 5.

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